error while building kstar

vijay13@ubuntu:~/kde$ git clone git://anongit.kde.org/kstars
Cloning into 'kstars'...
remote: Counting objects: 52712, done.
remote: Compressing objects: 100% (11154/11154), done.
remote: Total 52712 (delta 42685), reused 51218 (delta 41515)
Receiving objects: 100% (52712/52712), 56.08 MiB | 788 KiB/s, done.
Resolving deltas: 100% (42685/42685), done.
vijay13@ubuntu:~/kde$
vijay13@ubuntu:~/kde$ ls
kstars
vijay13@ubuntu:~/kde$ cd kstars/
vijay13@ubuntu:~/kde/kstars$ ls
AUTHORS    CMakeLists.txt         COPYING.DOC   INSTALL          kstars.kdevprj  README            README.ephemerides  README.planetmath   TODO
ChangeLog  config-kstars.h.cmake  datahandlers  kstars           kstars.lsm      README.api        README.i18n         README.timekeeping  TODO.old
cmake      COPYING                doc           kstars.kdevelop  Mainpage.dox    README.customize  README.images       Tests
vijay13@ubuntu:~/kde/kstars$ mkdi
mkdir        mkdiskimage
vijay13@ubuntu:~/kde/kstars$ mkdir build
vijay13@ubuntu:~/kde/kstars$ cd build/
vijay13@ubuntu:~/kde/kstars/build$ cmake ../kstars -DCMAKE_BUILD_TYPE=debugfull -DCMAKE_INSTALL_PREFIX=~/kde/usr
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
CMake Error at icons/CMakeLists.txt:2 (kde4_install_icons):
  Unknown CMake command "kde4_install_icons".


CMake Warning (dev) in CMakeLists.txt:
  No cmake_minimum_required command is present.  A line of code such as

    cmake_minimum_required(VERSION 2.8)

  should be added at the top of the file.  The version specified may be lower
  if you wish to support older CMake versions for this project.  For more
  information run "cmake --help-policy CMP0000".
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Configuring incomplete, errors occurred!